/
physfs.c
1410 lines (1108 loc) · 33.6 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
/**
* PhysicsFS; a portable, flexible file i/o abstraction.
*
* Documentation is in physfs.h. It's verbose, honest. :)
*
* Please see the file LICENSE in the source's root directory.
*
* This file written by Ryan C. Gordon.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
14
15
#include <fcntl.h>
#include <errno.h>
16
17
18
#include <assert.h>
#include "physfs.h"
19
20
21
#define __PHYSICSFS_INTERNAL__
#include "physfs_internal.h"
22
23
typedef struct __PHYSFS_ERRMSGTYPE__
{
24
PHYSFS_uint64 tid;
25
26
27
28
29
int errorAvailable;
char errorString[80];
struct __PHYSFS_ERRMSGTYPE__ *next;
} ErrMsg;
30
typedef struct __PHYSFS_DIRINFO__
31
32
{
char *dirName;
33
34
DirHandle *dirHandle;
struct __PHYSFS_DIRINFO__ *next;
35
} PhysDirInfo;
36
37
38
typedef struct __PHYSFS_FILEHANDLELIST__
{
39
PHYSFS_file handle;
40
41
struct __PHYSFS_FILEHANDLELIST__ *next;
} FileHandleList;
42
43
44
/* The various i/o drivers... */
45
46
#if (defined PHYSFS_SUPPORTS_ZIP)
47
48
extern const PHYSFS_ArchiveInfo __PHYSFS_ArchiveInfo_ZIP;
extern const DirFunctions __PHYSFS_DirFunctions_ZIP;
49
#endif
50
51
52
53
54
55
#if (defined PHYSFS_SUPPORTS_GRP)
extern const PHYSFS_ArchiveInfo __PHYSFS_ArchiveInfo_GRP;
extern const DirFunctions __PHYSFS_DirFunctions_GRP;
#endif
56
extern const DirFunctions __PHYSFS_DirFunctions_DIR;
57
58
static const PHYSFS_ArchiveInfo *supported_types[] =
59
60
{
#if (defined PHYSFS_SUPPORTS_ZIP)
61
&__PHYSFS_ArchiveInfo_ZIP,
62
63
#endif
64
65
66
67
#if (defined PHYSFS_SUPPORTS_GRP)
&__PHYSFS_ArchiveInfo_GRP,
#endif
68
69
70
NULL
};
71
72
73
74
75
76
static const DirFunctions *dirFunctions[] =
{
#if (defined PHYSFS_SUPPORTS_ZIP)
&__PHYSFS_DirFunctions_ZIP,
#endif
77
78
79
80
#if (defined PHYSFS_SUPPORTS_GRP)
&__PHYSFS_DirFunctions_GRP,
#endif
81
82
83
&__PHYSFS_DirFunctions_DIR,
NULL
};
84
85
86
87
88
89
/* General PhysicsFS state ... */
static int initialized = 0;
static ErrMsg *errorMessages = NULL;
90
91
static PhysDirInfo *searchPath = NULL;
static PhysDirInfo *writeDir = NULL;
92
93
94
95
96
97
static FileHandleList *openWriteList = NULL;
static FileHandleList *openReadList = NULL;
static char *baseDir = NULL;
static char *userDir = NULL;
static int allowSymLinks = 0;
98
99
100
/* mutexes ... */
static void *errorLock = NULL; /* protects error message list. */
static void *stateLock = NULL; /* protects other PhysFS static state. */
101
102
103
104
/* functions ... */
105
106
107
static ErrMsg *findErrorForCurrentThread(void)
{
ErrMsg *i;
108
PHYSFS_uint64 tid;
109
110
111
112
if (initialized)
__PHYSFS_platformGrabMutex(errorLock);
113
114
if (errorMessages != NULL)
{
115
tid = __PHYSFS_platformGetThreadID();
116
117
118
119
for (i = errorMessages; i != NULL; i = i->next)
{
if (i->tid == tid)
120
121
{
__PHYSFS_platformReleaseMutex(errorLock);
122
return(i);
123
} /* if */
124
125
} /* for */
} /* if */
126
127
128
if (initialized)
__PHYSFS_platformReleaseMutex(errorLock);
129
130
131
132
133
return(NULL); /* no error available. */
} /* findErrorForCurrentThread */
134
void __PHYSFS_setError(const char *str)
135
{
136
137
138
139
140
141
ErrMsg *err;
if (str == NULL)
return;
err = findErrorForCurrentThread();
142
143
144
145
146
147
148
if (err == NULL)
{
err = (ErrMsg *) malloc(sizeof (ErrMsg));
if (err == NULL)
return; /* uhh...? */
149
memset((void *) err, '\0', sizeof (ErrMsg));
150
err->tid = __PHYSFS_platformGetThreadID();
151
152
__PHYSFS_platformGrabMutex(errorLock);
153
154
err->next = errorMessages;
errorMessages = err;
155
__PHYSFS_platformReleaseMutex(errorLock);
156
157
158
159
160
} /* if */
err->errorAvailable = 1;
strncpy(err->errorString, str, sizeof (err->errorString));
err->errorString[sizeof (err->errorString) - 1] = '\0';
161
} /* __PHYSFS_setError */
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
const char *PHYSFS_getLastError(void)
{
ErrMsg *err = findErrorForCurrentThread();
if ((err == NULL) || (!err->errorAvailable))
return(NULL);
err->errorAvailable = 0;
return(err->errorString);
} /* PHYSFS_getLastError */
/* MAKE SURE that errorLock is held before calling this! */
177
178
179
180
181
182
183
static void freeErrorMessages(void)
{
ErrMsg *i;
ErrMsg *next;
for (i = errorMessages; i != NULL; i = next)
{
184
next = i->next;
185
186
187
188
189
free(i);
} /* for */
} /* freeErrorMessages */
190
191
192
193
194
195
196
197
198
199
200
void PHYSFS_getLinkedVersion(PHYSFS_Version *ver)
{
if (ver != NULL)
{
ver->major = PHYSFS_VER_MAJOR;
ver->minor = PHYSFS_VER_MINOR;
ver->patch = PHYSFS_VER_PATCH;
} /* if */
} /* PHYSFS_getLinkedVersion */
201
202
203
204
static DirHandle *openDirectory(const char *d, int forWriting)
{
const DirFunctions **i;
205
206
BAIL_IF_MACRO(!__PHYSFS_platformExists(d), ERR_NO_SUCH_FILE, NULL);
207
208
209
210
211
212
213
214
215
216
217
for (i = dirFunctions; *i != NULL; i++)
{
if ((*i)->isArchive(d, forWriting))
return( (*i)->openArchive(d, forWriting) );
} /* for */
__PHYSFS_setError(ERR_UNSUPPORTED_ARCHIVE);
return(NULL);
} /* openDirectory */
218
static PhysDirInfo *buildDirInfo(const char *newDir, int forWriting)
219
220
{
DirHandle *dirHandle = NULL;
221
PhysDirInfo *di = NULL;
222
223
224
225
226
227
BAIL_IF_MACRO(newDir == NULL, ERR_INVALID_ARGUMENT, 0);
dirHandle = openDirectory(newDir, forWriting);
BAIL_IF_MACRO(dirHandle == NULL, NULL, 0);
228
di = (PhysDirInfo *) malloc(sizeof (PhysDirInfo));
229
if (di == NULL)
230
{
231
dirHandle->funcs->dirClose(dirHandle);
232
233
BAIL_IF_MACRO(di == NULL, ERR_OUT_OF_MEMORY, 0);
} /* if */
234
235
236
237
238
di->dirName = (char *) malloc(strlen(newDir) + 1);
if (di->dirName == NULL)
{
free(di);
239
dirHandle->funcs->dirClose(dirHandle);
240
BAIL_MACRO(ERR_OUT_OF_MEMORY, 0);
241
242
243
244
245
246
247
248
249
} /* if */
di->next = NULL;
di->dirHandle = dirHandle;
strcpy(di->dirName, newDir);
return(di);
} /* buildDirInfo */
250
/* MAKE SURE you've got the stateLock held before calling this! */
251
static int freeDirInfo(PhysDirInfo *di, FileHandleList *openList)
252
253
254
255
256
257
258
259
{
FileHandleList *i;
if (di == NULL)
return(1);
for (i = openList; i != NULL; i = i->next)
{
260
const DirHandle *h = ((FileHandle *) &(i->handle.opaque))->dirHandle;
261
262
BAIL_IF_MACRO(h == di->dirHandle, ERR_FILES_STILL_OPEN, 0);
} /* for */
263
264
di->dirHandle->funcs->dirClose(di->dirHandle);
265
266
267
268
269
270
271
free(di->dirName);
free(di);
return(1);
} /* freeDirInfo */
static char *calculateUserDir(void)
272
273
274
275
276
277
{
char *retval = NULL;
const char *str = NULL;
str = __PHYSFS_platformGetUserDir();
if (str != NULL)
278
retval = (char *) str;
279
280
281
282
283
284
else
{
const char *dirsep = PHYSFS_getDirSeparator();
const char *uname = __PHYSFS_platformGetUserName();
str = (uname != NULL) ? uname : "default";
285
retval = (char *) malloc(strlen(baseDir) + strlen(str) +
286
strlen(dirsep) + 6);
287
288
289
290
if (retval == NULL)
__PHYSFS_setError(ERR_OUT_OF_MEMORY);
else
291
sprintf(retval, "%susers%s%s", baseDir, dirsep, str);
292
293
if (uname != NULL)
294
free((void *) uname);
295
296
297
298
299
300
} /* else */
return(retval);
} /* calculateUserDir */
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
static int appendDirSep(char **dir)
{
const char *dirsep = PHYSFS_getDirSeparator();
char *ptr;
if (strcmp((*dir + strlen(*dir)) - strlen(dirsep), dirsep) == 0)
return(1);
ptr = realloc(*dir, strlen(*dir) + strlen(dirsep) + 1);
if (!ptr)
{
free(*dir);
return(0);
} /* if */
strcat(ptr, dirsep);
*dir = ptr;
return(1);
} /* appendDirSep */
322
323
static char *calculateBaseDir(const char *argv0)
{
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
const char *dirsep = PHYSFS_getDirSeparator();
char *retval;
char *ptr;
/*
* See if the platform driver wants to handle this for us...
*/
retval = __PHYSFS_platformCalcBaseDir(argv0);
if (retval != NULL)
return(retval);
/*
* Determine if there's a path on argv0. If there is, that's the base dir.
*/
ptr = strstr(argv0, dirsep);
if (ptr != NULL)
{
char *p = ptr;
size_t size;
while (p != NULL)
{
ptr = p;
p = strstr(p + 1, dirsep);
} /* while */
size = (size_t) (ptr - argv0); /* !!! is this portable? */
retval = (char *) malloc(size + 1);
BAIL_IF_MACRO(retval == NULL, ERR_OUT_OF_MEMORY, NULL);
memcpy(retval, argv0, size);
retval[size] = '\0';
return(retval);
} /* if */
/*
* Last ditch effort: it's the current working directory. (*shrug*)
*/
360
361
362
363
364
365
366
367
368
369
370
371
372
retval = __PHYSFS_platformCurrentDir();
if(retval != NULL) {
return(retval);
}
/*
* Ok, current directory doesn't exist, use the root directory.
* Not a good alternative, but it only happens if the current
* directory was deleted from under the program.
*/
retval = (char *) malloc(strlen(dirsep) + 1);
strcpy(retval, dirsep);
return(retval);
373
374
375
} /* calculateBaseDir */
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
static int initializeMutexes(void)
{
errorLock = __PHYSFS_platformCreateMutex();
if (errorLock == NULL)
goto initializeMutexes_failed;
stateLock = __PHYSFS_platformCreateMutex();
if (stateLock == NULL)
goto initializeMutexes_failed;
return(1); /* success. */
initializeMutexes_failed:
if (errorLock != NULL)
__PHYSFS_platformDestroyMutex(errorLock);
if (stateLock != NULL)
__PHYSFS_platformDestroyMutex(stateLock);
errorLock = stateLock = NULL;
return(0); /* failed. */
} /* initializeMutexes */
400
401
int PHYSFS_init(const char *argv0)
{
402
403
char *ptr;
404
BAIL_IF_MACRO(initialized, ERR_IS_INITIALIZED, 0);
405
BAIL_IF_MACRO(!__PHYSFS_platformInit(), NULL, 0);
406
407
408
BAIL_IF_MACRO(!initializeMutexes(), NULL, 0);
409
baseDir = calculateBaseDir(argv0);
410
BAIL_IF_MACRO(baseDir == NULL, NULL, 0);
411
412
413
414
415
416
ptr = __PHYSFS_platformRealPath(baseDir);
free(baseDir);
BAIL_IF_MACRO(ptr == NULL, NULL, 0);
baseDir = ptr;
417
BAIL_IF_MACRO(!appendDirSep(&baseDir), NULL, 0);
418
419
userDir = calculateUserDir();
420
421
422
423
424
425
426
if (userDir != NULL)
{
ptr = __PHYSFS_platformRealPath(userDir);
free(userDir);
userDir = ptr;
} /* if */
427
if ((userDir == NULL) || (!appendDirSep(&userDir)))
428
429
430
431
432
433
{
free(baseDir);
baseDir = NULL;
return(0);
} /* if */
434
initialized = 1;
435
436
437
/* This makes sure that the error subsystem is initialized. */
__PHYSFS_setError(PHYSFS_getLastError());
438
439
440
441
return(1);
} /* PHYSFS_init */
442
/* MAKE SURE you hold stateLock before calling this! */
443
static int closeFileHandleList(FileHandleList **list)
444
445
446
{
FileHandleList *i;
FileHandleList *next = NULL;
447
FileHandle *h;
448
449
450
451
for (i = *list; i != NULL; i = next)
{
next = i->next;
452
453
h = (FileHandle *) (i->handle.opaque);
if (!h->funcs->fileClose(h))
454
455
456
457
458
459
{
*list = i;
return(0);
} /* if */
free(i);
460
461
462
} /* for */
*list = NULL;
463
464
return(1);
} /* closeFileHandleList */
465
466
467
/* MAKE SURE you hold the stateLock before calling this! */
468
469
static void freeSearchPath(void)
{
470
471
PhysDirInfo *i;
PhysDirInfo *next = NULL;
472
473
474
closeFileHandleList(&openReadList);
475
476
477
478
if (searchPath != NULL)
{
for (i = searchPath; i != NULL; i = next)
{
479
next = i->next;
480
freeDirInfo(i, openReadList);
481
482
483
484
485
486
} /* for */
searchPath = NULL;
} /* if */
} /* freeSearchPath */
487
int PHYSFS_deinit(void)
488
489
{
BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0);
490
BAIL_IF_MACRO(!__PHYSFS_platformDeinit(), NULL, 0);
491
492
closeFileHandleList(&openWriteList);
493
494
BAIL_IF_MACRO(!PHYSFS_setWriteDir(NULL), ERR_FILES_STILL_OPEN, 0);
495
496
497
freeSearchPath();
freeErrorMessages();
498
if (baseDir != NULL)
499
{
500
free(baseDir);
501
502
503
504
505
506
507
508
baseDir = NULL;
} /* if */
if (userDir != NULL)
{
free(userDir);
userDir = NULL;
} /* if */
509
510
allowSymLinks = 0;
511
initialized = 0;
512
513
514
515
516
__PHYSFS_platformDestroyMutex(errorLock);
__PHYSFS_platformDestroyMutex(stateLock);
errorLock = stateLock = NULL;
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
return(1);
} /* PHYSFS_deinit */
const PHYSFS_ArchiveInfo **PHYSFS_supportedArchiveTypes(void)
{
return(supported_types);
} /* PHYSFS_supportedArchiveTypes */
void PHYSFS_freeList(void *list)
{
void **i;
for (i = (void **) list; *i != NULL; i++)
free(*i);
free(list);
} /* PHYSFS_freeList */
const char *PHYSFS_getDirSeparator(void)
{
539
return(__PHYSFS_platformDirSeparator);
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
} /* PHYSFS_getDirSeparator */
char **PHYSFS_getCdRomDirs(void)
{
return(__PHYSFS_platformDetectAvailableCDs());
} /* PHYSFS_getCdRomDirs */
const char *PHYSFS_getBaseDir(void)
{
return(baseDir); /* this is calculated in PHYSFS_init()... */
} /* PHYSFS_getBaseDir */
const char *PHYSFS_getUserDir(void)
{
557
return(userDir); /* this is calculated in PHYSFS_init()... */
558
559
560
561
562
} /* PHYSFS_getUserDir */
const char *PHYSFS_getWriteDir(void)
{
563
564
565
566
567
568
const char *retval = NULL;
__PHYSFS_platformGrabMutex(stateLock);
if (writeDir != NULL)
retval = writeDir->dirName;
__PHYSFS_platformReleaseMutex(stateLock);
569
570
return(retval);
571
572
573
574
575
} /* PHYSFS_getWriteDir */
int PHYSFS_setWriteDir(const char *newDir)
{
576
577
578
579
int retval = 1;
__PHYSFS_platformGrabMutex(stateLock);
580
581
if (writeDir != NULL)
{
582
583
BAIL_IF_MACRO_MUTEX(!freeDirInfo(writeDir, openWriteList), NULL,
stateLock, 0);
584
585
586
writeDir = NULL;
} /* if */
587
588
if (newDir != NULL)
{
589
writeDir = buildDirInfo(newDir, 1);
590
retval = (writeDir != NULL);
591
} /* if */
592
593
594
595
__PHYSFS_platformReleaseMutex(stateLock);
return(retval);
596
597
598
599
600
} /* PHYSFS_setWriteDir */
int PHYSFS_addToSearchPath(const char *newDir, int appendToPath)
{
601
602
603
PhysDirInfo *di;
PhysDirInfo *prev = NULL;
PhysDirInfo *i;
604
605
__PHYSFS_platformGrabMutex(stateLock);
606
607
608
609
610
for (i = searchPath; i != NULL; i = i->next)
{
/* already in search path? */
BAIL_IF_MACRO_MUTEX(strcmp(newDir, i->dirName)==0, NULL, stateLock, 1);
611
prev = i;
612
} /* for */
613
614
di = buildDirInfo(newDir, 0);
615
BAIL_IF_MACRO_MUTEX(di == NULL, NULL, stateLock, 0);
616
617
618
if (appendToPath)
{
619
di->next = NULL;
620
if (prev == NULL)
621
searchPath = di;
622
else
623
prev->next = di;
624
625
626
627
628
} /* if */
else
{
di->next = searchPath;
searchPath = di;
629
630
} /* else */
631
__PHYSFS_platformReleaseMutex(stateLock);
632
633
634
635
636
637
return(1);
} /* PHYSFS_addToSearchPath */
int PHYSFS_removeFromSearchPath(const char *oldDir)
{
638
639
640
PhysDirInfo *i;
PhysDirInfo *prev = NULL;
PhysDirInfo *next = NULL;
641
642
643
BAIL_IF_MACRO(oldDir == NULL, ERR_INVALID_ARGUMENT, 0);
644
__PHYSFS_platformGrabMutex(stateLock);
645
646
647
648
for (i = searchPath; i != NULL; i = i->next)
{
if (strcmp(i->dirName, oldDir) == 0)
{
649
next = i->next;
650
651
BAIL_IF_MACRO_MUTEX(!freeDirInfo(i, openReadList), NULL,
stateLock, 0);
652
653
if (prev == NULL)
654
searchPath = next;
655
else
656
prev->next = next;
657
658
BAIL_MACRO_MUTEX(NULL, stateLock, 1);
659
660
661
662
} /* if */
prev = i;
} /* for */
663
BAIL_MACRO_MUTEX(ERR_NOT_IN_SEARCH_PATH, stateLock, 0);
664
665
666
667
668
669
670
} /* PHYSFS_removeFromSearchPath */
char **PHYSFS_getSearchPath(void)
{
int count = 1;
int x;
671
PhysDirInfo *i;
672
673
char **retval;
674
675
__PHYSFS_platformGrabMutex(stateLock);
676
677
678
679
for (i = searchPath; i != NULL; i = i->next)
count++;
retval = (char **) malloc(sizeof (char *) * count);
680
BAIL_IF_MACRO_MUTEX(!retval, ERR_OUT_OF_MEMORY, stateLock, NULL);
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
count--;
retval[count] = NULL;
for (i = searchPath, x = 0; x < count; i = i->next, x++)
{
retval[x] = (char *) malloc(strlen(i->dirName) + 1);
if (retval[x] == NULL) /* this is friggin' ugly. */
{
while (x > 0)
{
x--;
free(retval[x]);
} /* while */
free(retval);
696
BAIL_MACRO_MUTEX(ERR_OUT_OF_MEMORY, stateLock, NULL);
697
698
699
700
701
} /* if */
strcpy(retval[x], i->dirName);
} /* for */
702
__PHYSFS_platformReleaseMutex(stateLock);
703
704
705
706
return(retval);
} /* PHYSFS_getSearchPath */
707
708
709
int PHYSFS_setSaneConfig(const char *organization, const char *appName,
const char *archiveExt, int includeCdRoms,
int archivesFirst)
710
{
711
712
713
714
715
const char *basedir = PHYSFS_getBaseDir();
const char *userdir = PHYSFS_getUserDir();
const char *dirsep = PHYSFS_getDirSeparator();
char *str;
716
717
BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0);
718
/* set write dir... */
719
720
str = malloc(strlen(userdir) + (strlen(organization) * 2) +
(strlen(appName) * 2) + (strlen(dirsep) * 3) + 2);
721
BAIL_IF_MACRO(str == NULL, ERR_OUT_OF_MEMORY, 0);
722
sprintf(str, "%s.%s%s%s", userdir, organization, dirsep, appName);
723
724
725
if (!PHYSFS_setWriteDir(str))
{
726
727
int no_write = 0;
sprintf(str, ".%s/%s", organization, appName);
728
if ( (PHYSFS_setWriteDir(userdir)) &&
729
(PHYSFS_mkdir(str)) )
730
{
731
732
733
sprintf(str, "%s.%s%s%s", userdir, organization, dirsep, appName);
if (!PHYSFS_setWriteDir(str))
no_write = 1;
734
735
} /* if */
else
736
{
737
no_write = 1;
738
} /* else */
739
740
741
742
743
744
745
if (no_write)
{
PHYSFS_setWriteDir(NULL); /* just in case. */
free(str);
BAIL_MACRO(ERR_CANT_SET_WRITE_DIR, 0);
} /* if */
746
747
} /* if */
748
749
/* Put write dir first in search path... */
PHYSFS_addToSearchPath(str, 0);
750
751
free(str);
752
/* Put base path on search path... */
753
754
755
756
757
758
759
760
PHYSFS_addToSearchPath(basedir, 1);
/* handle CD-ROMs... */
if (includeCdRoms)
{
char **cds = PHYSFS_getCdRomDirs();
char **i;
for (i = cds; *i != NULL; i++)
761
PHYSFS_addToSearchPath(*i, 1);
762
763
764
765
766
767
768
769
770
PHYSFS_freeList(cds);
} /* if */
/* Root out archives, and add them to search path... */
if (archiveExt != NULL)
{
char **rc = PHYSFS_enumerateFiles("");
char **i;
771
size_t extlen = strlen(archiveExt);
772
773
774
775
char *ext;
for (i = rc; *i != NULL; i++)
{
776
777
size_t l = strlen(*i);
if ((l > extlen) && ((*i)[l - extlen - 1] == '.'))
778
779
780
781
782
783
784
785
786
{
ext = (*i) + (l - extlen);
if (__PHYSFS_platformStricmp(ext, archiveExt) == 0)
{
const char *d = PHYSFS_getRealDir(*i);
str = malloc(strlen(d) + strlen(dirsep) + l + 1);
if (str != NULL)
{
sprintf(str, "%s%s%s", d, dirsep, *i);
787
PHYSFS_addToSearchPath(str, archivesFirst == 0);
788
789
790
791
792
793
794
795
796
797
free(str);
} /* if */
} /* if */
} /* if */
} /* for */
PHYSFS_freeList(rc);
} /* if */
return(1);
798
799
800
} /* PHYSFS_setSaneConfig */
801
802
803
804
805
806
void PHYSFS_permitSymbolicLinks(int allow)
{
allowSymLinks = allow;
} /* PHYSFS_permitSymbolicLinks */
807
/* string manipulation in C makes my ass itch. */
808
809
810
char * __PHYSFS_convertToDependent(const char *prepend,
const char *dirName,
const char *append)
811
{
812
const char *dirsep = __PHYSFS_platformDirSeparator;
813
size_t sepsize = strlen(dirsep);
814
815
816
817
818
char *str;
char *i1;
char *i2;
size_t allocSize;
819
820
821
while (*dirName == '/')
dirName++;
822
allocSize = strlen(dirName) + 1;
823
824
825
826
827
828
829
830
if (prepend != NULL)
allocSize += strlen(prepend) + sepsize;
if (append != NULL)
allocSize += strlen(append) + sepsize;
/* make sure there's enough space if the dir separator is bigger. */
if (sepsize > 1)
{
831
832
str = (char *) dirName;
do
833
{
834
835
836
str = strchr(str, '/');
if (str != NULL)
{
837
allocSize += (sepsize - 1);
838
839
840
str++;
} /* if */
} while (str != NULL);
841
842
843
844
845
} /* if */
str = (char *) malloc(allocSize);
BAIL_IF_MACRO(str == NULL, ERR_OUT_OF_MEMORY, NULL);
846
847
848
if (prepend == NULL)
*str = '\0';
else
849
850
851
{
strcpy(str, prepend);
strcat(str, dirsep);
852
} /* else */
853
854
for (i1 = (char *) dirName, i2 = str + strlen(str); *i1; i1++, i2++)
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
{
if (*i1 == '/')
{
strcpy(i2, dirsep);
i2 += sepsize;
} /* if */
else
{
*i2 = *i1;
} /* else */
} /* for */
*i2 = '\0';
if (append)
{
strcat(str, dirsep);
strcpy(str, append);
} /* if */
return(str);
875
} /* __PHYSFS_convertToDependent */
876
877
878
int __PHYSFS_verifySecurity(DirHandle *h, const char *fname)
879
{
880
881
882
int retval = 1;
char *start;
char *end;
883
884
char *str;
885
886
887
start = str = malloc(strlen(fname) + 1);
BAIL_IF_MACRO(str == NULL, ERR_OUT_OF_MEMORY, 0);
strcpy(str, fname);
888
889
890
891
892
893
894
895
896
while (1)
{
end = strchr(start, '/');
if (end != NULL)
*end = '\0';
if ( (strcmp(start, ".") == 0) ||
(strcmp(start, "..") == 0) ||
897
(strchr(start, '\\') != NULL) ||
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
(strchr(start, ':') != NULL) )
{
__PHYSFS_setError(ERR_INSECURE_FNAME);
retval = 0;
break;
} /* if */
if ((!allowSymLinks) && (h->funcs->isSymLink(h, str)))
{
__PHYSFS_setError(ERR_SYMLINK_DISALLOWED);
retval = 0;
break;
} /* if */
if (end == NULL)
break;
*end = '/';
start = end + 1;
} /* while */
918
919
free(str);
920
921
return(retval);
} /* __PHYSFS_verifySecurity */
922
923
924
int PHYSFS_mkdir(const char *dname)
925
{
926
DirHandle *h;
927
char *str;
928
929
930
char *start;
char *end;
int retval = 0;
931
932
933
934
BAIL_IF_MACRO(dname == NULL, ERR_INVALID_ARGUMENT, 0);
while (*dname == '/')
dname++;
935
936
937
__PHYSFS_platformGrabMutex(stateLock);
BAIL_IF_MACRO_MUTEX(writeDir == NULL, ERR_NO_WRITE_DIR, stateLock, 0);
938
h = writeDir->dirHandle;
939
940
941
942
943
BAIL_IF_MACRO_MUTEX(!h->funcs->mkdir, ERR_NOT_SUPPORTED, stateLock, 0);
BAIL_IF_MACRO_MUTEX(!__PHYSFS_verifySecurity(h, dname), NULL, stateLock, 0);
start = str = malloc(strlen(dname) + 1);
BAIL_IF_MACRO_MUTEX(str == NULL, ERR_OUT_OF_MEMORY, stateLock, 0);
strcpy(str, dname);
944
945
946
947
948
949
while (1)
{
end = strchr(start, '/');
if (end != NULL)
*end = '\0';
950
951
952
953
retval = h->funcs->mkdir(h, str);
if (!retval)
break;
954
955
956
if (end == NULL)
break;
957
958
959
960
*end = '/';
start = end + 1;
} /* while */
961
962
963
__PHYSFS_platformReleaseMutex(stateLock);
964
965
966
967
968
969
free(str);
return(retval);
} /* PHYSFS_mkdir */
int PHYSFS_delete(const char *fname)
970
{
971
int retval;
972
DirHandle *h;
973
974
BAIL_IF_MACRO(fname == NULL, ERR_INVALID_ARGUMENT, 0);
975
976
977
while (*fname == '/')
fname++;
978
979
980
981
982
983
984
985
986
987
__PHYSFS_platformGrabMutex(stateLock);
BAIL_IF_MACRO_MUTEX(writeDir == NULL, ERR_NO_WRITE_DIR, stateLock, 0);
h = writeDir->dirHandle;
BAIL_IF_MACRO_MUTEX(!h->funcs->remove, ERR_NOT_SUPPORTED, stateLock, 0);
BAIL_IF_MACRO_MUTEX(!__PHYSFS_verifySecurity(h, fname), NULL, stateLock, 0);
retval = h->funcs->remove(h, fname);
__PHYSFS_platformReleaseMutex(stateLock);
return(retval);
988
} /* PHYSFS_delete */
989
990
991
992
const char *PHYSFS_getRealDir(const char *filename)
{
993
PhysDirInfo *i;
994
995
996
997
while (*filename == '/')
filename++;
998
__PHYSFS_platformGrabMutex(stateLock);
999
1000
for (i = searchPath; i != NULL; i = i->next)
{